If you are getting too many emails from nagios service, you can create a filter in gmail.
From: nagios@company.com
to: shantanu.oa+nagios@gmail.com
Doesn't have : (db1 OR db2 OR localhost)

Do this: Skip Inbox, Apply label "company/nagios", Never send it to Spam

Download and Install redis from http://www.redis.io/download or use the following commands on the target server.

$ wget http://redis.googlecode.com/files/redis-2.2.8.tar.gz
$ tar xzf redis-2.2.8.tar.gz
$ cd redis-2.2.8
$ make

Start the redis server. To start the redis server please use the following command
$src/redis-server

configure the redis server ip in the Java properties file (cache.server) and ip (cache.port). The default port is 6379.

Important things to remember about Linux date:

* /etc/sysconfig/clock sets whether the hardware clock is stored as UTC or local time.
* Symlink /etc/localtime to /usr/share/zoneinfo/... to set your timezone.
* Run ``date MMDDhhmm'' to set the current system date/time.
* Type ``/sbin/hwclock --systohc [--utc]'' to set the hardware clock.

The default 8pt Tahoma font looks very small in Skype. It can be changed to 11pt Times New Roman. Tools - Option - IM & SMS - IM appearance - Change font

// copy the file to RAM - 30 times faster
cp -af /root/100mb.bin /dev/shm/

// increase it to 4GB
mount -o remount,size=4G /dev/shm

// new memory device
mkdir -p /var/www/www.mysite.com/ramdrive
mount -t tmpfs -o size=500M,mode=0744 tmpfs /var/www/www.mysite.com/ramdrive

// add it to /etc/fstab to make it permanent:
tmpfs /var/www/www.mysite.com/ramdrive tmpfs size=500M,mode=0777 0 0

660 mysql data dir
700 home directory
777 world writeable files
chmod +x asper.sh OR (chmod 754 asper.sh)

Default value of kernel net.ipv4.tcp_max_syn_backlog is 2048, increase it to 8192. Default value of net.core.somaxconn kernel setting is 128 and can be increased to 1000
MySQL parameter back_log which has default value of just 50. You may want to set it to 1000 or even higher.

If innodb_fast_shutdown is set to 0, the log files are purged when mysqld shuts down - larger files mean a longer shutdown time. The default for innodb_fast_shutdown is 1, which
means that the log files are not purged before a shutdown. A value is 2 simulates a crash, and at the next startup InnoDB will do a crash recovery.
This can be useful when testing to see approximately how long InnoDB takes to recover from a crash, to determine if the size of your log files is too large.

You must have used the wikipedia search plug-in for firefox. I have written a similar plug-in that will take you to mobile wikipedia page.

http://mycroft.mozdev.org/search-engines.html?author=shantanu.oak

It is very fast, without images and looks good even on very small screens.

CURL can be used very effectively using PHP. Here is an example.

# cat curl.php
<?php
$ch = curl_init("http://www.google.com/");
$fp = fopen("example.txt", "w");

curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);

curl_exec($ch);
curl_close($ch);
fclose($fp);
?>